"I use she and I. "This is she" when answering the phone, or " this is I" or "it is I" as well. I have children of school age that I want to go to college, I want them to go far in life. I try to prevent them from using slang, especially today's slang which is just horrible, because as they grow older and go on interviews and go into the business world, I want them to sound intelligent and for them to stand out. I do not think using proper English is snobbery, but I do think it might be becoming a lost art."

Roz Oct-05-2011

The problem with this is it ISN'T correct. People are saying "this is she and she is this" are interchangeable. Lets change one parameter. You are pointing out a friend to someone you want to introduce her to. "That is she" isn't right.
I have the sneaking suspicion you would say "Would you like to go to the store with Tom and I?" is correct. It is not. "Would you like to go to the store with I"? It's called an object of the prepostion. Object. Obejective form of 1st person singular is "me"
English is Subject+Verb+Object. Not Subject+Verb+Subject.
It sounds classy and elegant to you, but it ignores the basic rules of grammar.